[libFuzzer] add -print_final_stats=1 flag

llvm-svn: 262084
diff --git a/llvm/lib/Fuzzer/test/fuzzer.test b/llvm/lib/Fuzzer/test/fuzzer.test
index 3d9f5b4..b316337 100644
--- a/llvm/lib/Fuzzer/test/fuzzer.test
+++ b/llvm/lib/Fuzzer/test/fuzzer.test
@@ -69,3 +69,11 @@
 RUN: not LLVMFuzzer-CustomMutatorTest 2>&1 | FileCheck %s --check-prefix=LLVMFuzzerCustomMutator
 LLVMFuzzerCustomMutator: In LLVMFuzzerCustomMutator
 LLVMFuzzerCustomMutator: BINGO
+
+RUN: LLVMFuzzer-SimpleTest -seed=1 -runs=77 -print_final_stats=1 2>&1 | FileCheck %s --check-prefix=FINAL_STATS
+FINAL_STATS: stat::number_of_executed_units: 77
+FINAL_STATS: stat::average_exec_per_sec:     0
+FINAL_STATS: stat::new_units_added:
+FINAL_STATS: stat::slowest_unit_time_sec:    0
+FINAL_STATS: stat::peak_rss_mb:
+